Itmay be a late reply but jailbreaking _does_not_ void the warranty unless: ""Apple cannot void an iPhone's warranty unless it can show that a problem or component failure is linked to the installation or placement of after-market item such as unauthorized applications""
A forbes tech UK article about the matter. To make sure that whatever issue you've got is not software related, they will ask you to restore the iPhone to factory settings (they ask for that anyway with whatever issues). If you have applecare and your screen cracks - they will still replace it. Also any manufactures defects etc... So no, it doesn't void the warranty.
What you're saying was brought up 100s of times in regards to changing ram/hdd to sdd in a macbook until apple released the diy list. If you break something while swapping the ram - it voids your warranty. Swapping it however doesn't automatically do so.
I have been in an Apple Store at the Genius Bar when a tech would not even look at someone's device until the jailbreak was removed. This may be different if they have something like a cracked screen under AppleCare but if it is anything else they can refuse to work on it until the jailbreak is removed. Even if it's faulty RAM or a bad battery that will be covered, they may not look at it until the jailbreak is gone. Of course that could be to the discretion of the tech but I have seen service refused.
The term "jailbreak" is the process by which some form of arbitrary code execution (usually by spawning of an SSH shell) is obtained by exploiting the kernel (and other protections, such as AMFI, PAC, PPL, KPP, and KTRR - but these do not apply to every software version) of iOS, iPadOS, watchOS, tvOS, audioOS, or bridgeOS. It used to be done by patching /private/etc/fstab to mount the System partition as 'read-write'. This is entirely different from an unlock. Jailbreaking is the first action that must be taken before things like unofficial activation (hacktivation), and unofficial unlocking can be applied.
Older jailbreaks also included modifying the AFC service (used by iTunes to access the filesystem) to give full filesystem access from root. This was later updated to create a new service (AFC2) that allows access to the full filesystem.
1. Full Tweak Injection support (tweaks like AppSync Unified, Springboard tweaks, and tweaks that modify daemons - which generally requires kernel r/w and other bypasses - will not work - that's why tweak injection libraries such as ElleKit are not functional)
3. Executing custom LaunchDaemons (Every daemon/service execution was done via launchd binary provided by Apple and signed by Apple - that binary only allows platform binaries to run with those privileges - if the target binary is not platform binary signed by Apple, it will deny execution - CoreTrust bugs cannot exploit this since the kernel will check and verify executions done by launchd binary. That also means that patching this binary directly without patching the kernel first will result in a kernel panic)
Due to restriction posed by KPP, KTRR, PPL, SPTM, TXM and PAC, having kernel r/w alone cannot achieve a jailbreak on arm64e devices. However, with the CoreTrust bypass, it's possible to implement most baseline functionality of the jailbreak.
iOS jailbreaking is the use of a privilege escalation exploit to remove software restrictions imposed by Apple on devices running iOS and iOS-based[a] operating systems. It is typically done through a series of kernel patches. A jailbroken device typically permits root access within the operating system and provides the right to install software unavailable through the App Store. Different devices and versions are exploited with a variety of tools. Apple views jailbreaking as a violation of the end-user license agreement and strongly cautions device owners not to try to achieve root access through the exploitation of vulnerabilities.[1]
While sometimes compared to rooting an Android device, jailbreaking bypasses several types of Apple prohibitions for the end-user. Since it includes modifying the operating system (enforced by a "locked bootloader"), installing non-officially approved (not available on the App Store) applications via sideloading, and granting the user elevated administration-level privileges (rooting), the concepts of iOS jailbreaking are therefore technically different from Android device rooting.
Expanding the feature set that Apple and its App Store have restricted is one of the motivations for jailbreaking.[2] Apple checks apps for compliance with its iOS Developer Program License Agreement[3] before accepting them for distribution in the App Store. However, the reasons for Apple to ban apps are not limited to safety and security and may be regarded as arbitrary and capricious.[4] In one case, Apple mistakenly banned an app by a Pulitzer-Winning cartoonist because it violated its developer license agreement, which specifically bans apps that "contain content that ridicules public figures."[5] To access banned apps,[6] users rely on jailbreaking to circumvent Apple's censorship of content and features. Jailbreaking permits the downloading of programs not approved by Apple,[7] such as user interface customization and tweaks.
Software programs that are available through APT or Installer.app (legacy) are not required to adhere to App Store guidelines. Most of them are not typical self-contained apps, but instead are extensions and customizations for iOS or other apps (commonly called tweaks).[8] Users can install these programs for purposes including personalization and customization of the interface using tweaks developed by developers and designers,[8] adding desired features such as access to the root file system and fixing annoyances,[9] and making development work on the device easier by providing access to the file system and command-line tools.[10][11] Many Chinese iOS device owners also jailbreak their phones to install third-party Chinese character input systems because they are easier to use than Apple's.[12]
Jailbreaking also opens the possibility for using software to unofficially unlock carrier-locked iPhones so they can be used with other carriers.[19] Software-based unlocks have been available since September 2007,[20] with each tool applying to a specific iPhone model and baseband version (or multiple models and versions).[21] This includes the iPhone 4S, iPhone 4, iPhone 3GS, and iPhone 3G models. An example of unlocking an iPhone through a Jailbreak utility would be Redsn0w. Through this software, iPhone users will be able to create a custom IPSW and unlock their device. Moreover, during the unlocking process, there are options to install Cydia the iPad baseband.
Cybercriminals may jailbreak an iPhone to install malware or target jailbroken iPhones on which malware can be installed more easily. The Italian cybersecurity company Hacking Team, which sells hacking software to law enforcement agencies, advised police to jailbreak iPhones to allow tracking software to be installed on them.[22][23]
On iOS devices, the installation of consumer software is generally restricted to installation through the App Store. Jailbreaking, therefore, allows the installation of pirated applications.[24] It has been suggested that a major motivation for Apple to prevent jailbreaking is to protect the income of its App Store, including third-party developers and allow the buildup of a sustainable market for third-party software.[25] However, the installation of pirated applications is also possible without jailbreaking, taking advantage of enterprise certificates to facilitate the distribution of modified or pirated releases of popular applications.[26]
A package manager or package-management system is a collection of software tools that automates the process of installing, upgrading, configuring, and removing computer programs. For jailbreaks, this is essential for the installation of third-party content. There are a few package managers specifically for jailbroken iOS devices, of which the most popular are Cydia, Sileo, Zebra and Installer 5.
Once a device is jailbroken, the built-in security is compromised due to the vast amount of kernel patches that go into building the tool. Security structures like Apple Mobile File Integrity, Sandbox, Read-Only Root File system, and trusted apps get disabled or otherwise tampered with, to achieve the goals of the jailbreaking tool. This, in turn, creates potential security issues for the user of a jailbroken device.
Users of a jailbroken device are also often forced to stay on an inferior iOS version that is no longer supported by Apple because newer versions usually cannot be jailbroken right away. This has the potential to introduce security issues because for these older versions there are known security vulnerabilities, exploits, and exploit proof of concepts published.
In March 2021, jailbreak developer GeoSn0w[27] released a tweak called iSecureOS which can alert the users of security issues found on their devices. The application works akin to antivirus software, in that it scans the files on the user's device and checks them against a database of known malware or unsafe repos.
In June 2021, ESET Research confirmed that malware did exist on one of the piracy repositories in the jailbreak community. The malware actively targeted iSecureOS to try to bypass the detection,[28] but updates to the security app were quickly released and have mitigated the malware.
Where Android rooting and jailbreaking are similar is that both are used to grant the owner of the device superuser system-level privileges, which may be transferred to one or more apps. However, unlike iOS phones and tablets, nearly all Android devices already offer an option to allow the user to sideload 3rd-party apps onto the device without having to install from an official source such as the Google Play store.[29] Many Android devices also provide owners the capability to modify or even replace the full operating system after unlocking the bootloader, although doing this requires a factory reset.[30][31][32]
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